INSTALLATION
When replacing the spark plugs and spark plug
cables, route the cables correctly and secure them in
the appropriate retainers. Failure to route the cables
properly can cause the radio to reproduce ignition
noise, cross ignition of the spark plugs orshort cir-
cuit the cables to ground.
(1) To avoid cross threading, start the spark plug
into the cylinder head by hand.
(2) Tighten spark plugs to 17.5 N´m (13 ft. lbs.)
torque.
(3) Install spark plug cables over spark plugs. A
click will be heard and felt when the cable properly
attaches to the spark plug.
SPARK PLUG CABLE
DESCRIPTION
Spark Plug cables are sometimes referred to as
secondary ignition wires. The wires transfer electri-
cal current from the ignition coil pack to individual
spark plugs at each cylinder. The resistive spark plug
cables are of nonmetallic construction. The cables
provide suppression of radio frequency emissions
from the ignition system.
Check the spark plug cable connections for good
contact at the coil, and spark plugs. Terminals should
be fully seated. The insulators should be in good con-
dition and should fit tightly on the coil, and spark
plugs. Spark plug cables with insulators that are
cracked or torn must be replaced.
Clean Spark Plug cables with a cloth moistened
with a non-flammable solvent. Wipe the cables dry.
Check for brittle or cracked insulation. The spark
plug cables and spark plug boots are made from high
temperature silicone materials. All spark plug cable
leads are properly identified with cylinder numbers.
The inside of most the spark plug boot is coated with
a special high temperature silicone grease for greater
sealing and to minimize boot bonding to the spark
plug insulator.
REMOVAL
Failure to route the cables properly could cause the
radio to reproduce ignition noise, cross ignition of the
spark plugs or short circuit the cables to ground.
Remove spark plug cable from coil first.
Always remove the spark plug cable by grasping
the top of the spark plug insulator, turning the boot
1/2 turn and pulling straight up in a steady motion.
INSTALLATION
Failure to route the cables properly could cause the
radio to reproduce ignition noise, cross ignition of the
spark plugs or short circuit the cables to ground.
Install spark plug insulators over spark plugs.
Ensure the top of the spark plug insulator covers the
upper end of the spark plug tube, then connect the
other end to coil pack.
Fig. 14 Setting Spark Plug Electrode Gap
1 - TAPER GAUGE
8I - 10 IGNITION CONTROLRS
SPARK PLUG (Continued)
ProCarManuals.com
IGNITION CONTROL
TABLE OF CONTENTS
page page
GLOW PLUG
DESCRIPTION..........................1
OPERATION............................1
GLOW PLUG RELAY
DESCRIPTION..........................1
OPERATION............................1CAMSHAFT POSITION SENSOR
DESCRIPTION..........................2
OPERATION............................2
REMOVAL.............................2
INSTALLATION..........................2
GLOW PLUG
DESCRIPTION
Glow plugs are used to help start a cold or cool
engine (Fig. 1). The glow plugs will heat up and glow
to heat the combustion chamber of each cylinder. An
individual glow plug is used for each cylinder. Each
glow plug is threaded into the left side of the cylinder
head below the cylinder head cover/intake manifold.
OPERATION
Each glow plug will momentarily draw approxi-
mately 25 amps of electrical current during the ini-
tial key ªONº cycle. This is on a cold or cool engine.
After heating the current draw will drop to approxi-
mately 9±12 amps per plug.
Total momentary cuurent draw for all four glow
plugs is approximately 100 amps on a cold engine
dropping to a total of approximately 40 amps after
the plugs are heated.
Electrical operation of the glow plugs is controlled
by two glow plug relays. Each glow plug relay con-
trols two glow plugs. Refer to glow plug relays for
more information.
GLOW PLUG RELAY
DESCRIPTION
There are two glow plug relays. These relays are
located in the Power Distribution Center (PDC) in
the engine compartment (Fig. 2).
OPERATION
When the ignition (key) switch is place in the ON
position, a signal is sent to the ECM relating current
engine coolant temperature. This signal is sent from
the engine coolant temperature sensor.
After receiving this signal, the ECM will determine
if, when and for how long of a period the glow plug
relays should be activated. This is done before, dur-
ing and after the engine is started. Whenever the
glow plug relays are activated, it will control the 12
volt 100 amp circuit for the operation of the four
glow plugs. Each relay control two glow plugs.
Fig. 1 GLOW PLUG
Fig. 2 RELAY LOCATIONS
1 - GLOW PLUG RELAY
2 - RADIATOR SUPPORT
3 - CHARGE AIR COOLER OUTLET HOSE
4 - COOLING FAN RELAY
5 - UPPER RADIATOR HOSE
6 - EGR SOLENOID
RGIGNITION CONTROL8Ia-1
ProCarManuals.com
The Glow Plug lamp is tied to this circuit. Lamp
operation is also controlled by the ECM.
With a cold engine, the glow plug relays and glow
plugs may be activated for a maximum time of 200
seconds. Refer to the following Glow Plug Control
chart for a temperature/time comparison of the glow
plug relay operation.
In this chart, Pre-Heat and Post-Heat times are
mentioned. Pre-Heat is the amount of time the glow
plug relay control circuit is activated when the igni-
tion (key) is switched ON, without the engine run-
ning. Post-Heat is the amount of time the glow plug
relay control circuit is activated after the engine is
operated. The Glow Plug lamp will not be activated
during the post-heat cycle.
Engine
Coolant
Temperature
9Key ON9Wait-To
Start Lamp
9ON9
(Seconds)Pre-Heat
Cycle
(Glow
Plugs On
Seconds)Post-Heat
Cycle
(Seconds)
-30C 20 SEC. 35 SEC. 200 SEC.
-10C 8 SEC. 23 SEC. 180 SEC.
+10C 6 SEC. 21 SEC. 160 SEC.
+30C 5 SEC. 20 SEC. 140 SEC.
+40C 4 SEC. 19 SEC. 70 SEC.
+70C 1 SEC. 16 SEC. 20 SEC.
CAMSHAFT POSITION
SENSOR
DESCRIPTION
The camshaft position (CMP) sensor is mounted in
the top of cylinder head cover/intake manifold at the
rear of the engine. The CMP sensor is a hall effect
device (Fig. 3).
OPERATION
The CMP sensor is a hall effect switch. A tooth
made of a ferromagnetic material is attached to the
camshaft. When this tooth passes the CMP sensor an
lectronic signal is created. This signal is then sent to
the engine control module (ECM). This signal is used
by the ECM to determine which cylinder has just
entered its compression phase.
REMOVAL
(1) Disconnect negative battery cable.
(2) Remove engine cover (Refer to 9 - ENGINE
COVER - REMOVAL).
(3) Disconnect camshaft position sensor electrical
connector (Fig. 4).
(4) Remove sensor retaining bolt and remove sen-
sor from cylinder head cover.
INSTALLATION
(1) Lubricate O-ring and install sensor in cylinder
head cover. Torque retaining bolt to 5.4 N´m.
(2) Connect camshaft position sensor electrical
connector.
(3) Install engine cover (Refer to 9 - ENGINE
COVER - INSTALLATION).
(4) Connect negative battery cable.
Fig. 3 CAMSHAFT POSITION SENSOR
Fig. 4 CAMSHAFT POSITION SENSOR LOCATION
1 - CAMSHAFT POSITION SENSOR
2 - CAMSHAFT POSITION SENSOR ELCTRICAL SENSOR
3 - FUEL INJECTOR
4 - CYLINDER HEAD COVER
5 - OIL SEPARATOR
8Ia - 2 IGNITION CONTROLRG
GLOW PLUG RELAY (Continued)
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INSTRUMENT CLUSTER
TABLE OF CONTENTS
page page
INSTRUMENT CLUSTER
DESCRIPTION..........................1
OPERATION............................1
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - SELF-
DIAGNOSTICS.........................2
DIAGNOSIS AND TESTING - CLUSTER
DIAGNOSIS...........................2
REMOVAL.............................11
INSTALLATION.........................12CLUSTER LENS
REMOVAL.............................12
INSTALLATION.........................12
MECHANICAL TRANSMISSION RANGE
INDICATOR
REMOVAL.............................12
INSTALLATION.........................12
RED BRAKE WARNING INDICATOR
DESCRIPTION.........................13
OPERATION...........................13
INSTRUMENT CLUSTER
DESCRIPTION
The instrumentation gauges are contained in a
subdial assembly within the instrument cluster. The
individual gauges are not serviceable. If one of the
cluster gauges becomes faulty, the entire cluster
would require replacement.
The mechanical instrument cluster with a tachom-
eter is equipped with a electronic vacuum fluorescent
transmission range indicator (PRND3L), odometer,
and trip odometer display.
The mechanical instrument cluster without a
tachometer is equipped with a cable operated trans-
mission range indicator (PRND21) and a vacuum flu-
orescent odometer display. It also has the following
indicators:
²Turn Signals
²High Beam
²Oil Pressure
²MIL
The instrument cluster is equipped with the follow-
ing warning lamps.
²Lift Gate Ajar
²Low Fuel Level
²Low Windshield Washer Fluid Level
²Cruise
²Battery Voltage
²Fasten Seat Belt
²Door Ajar
²Coolant Temperature
²Anti-Lock Brake
²Brake
²Airbag
²Traction Control
²AutostickThe mechanical instrument cluster without a
tachometer also has the following warning lamps:
²Turns Signals
²High Beam
²Oil Pressure
²Malfunction Indicator Lamp (MIL)
WATER IN FUEL LAMP - EXPORT
The Water In Fuel Lamp is located in the instru-
ment cluster. When moisture is found within the fuel
system, the sensor sends a message via the PCI data
bus to the instrument cluster. The sensor is located
underneath the vehicle, directly above the rear axle.
The sensor is housed within the fuel filter/water sep-
arator assembly cover. The sensor is not serviced sep-
arately. If found defective, the entire assembly cover
must be replaced.
OPERATION
Refer to the vehicle Owner's Manual for operation
instructions and conditions for the Instrument Clus-
ter Gauges.
WATER IN FUEL LAMP - EXPORT
The Water In Fuel Sensor is a resistive type
switch. It is calibrated to sense the different resis-
tance between diesel fuel and water. When water
enters the fuel system, it is caught in the bottom of
the fuel filter/water separator assembly, where the
sensor is located. Water has less resistance than die-
sel fuel. The sensor then sends a PCI data bus mes-
sage to the instrument cluster to illuminate the
lamp.
If the lamp is inoperative, perform the self diag-
nostic test on the instrument cluster to check the
lamp operation before continuing diagnosis.
RSINSTRUMENT CLUSTER8J-1
ProCarManuals.com
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - SELF-
DIAGNOSTICS
The instrument clusters are equipped with a self
diagnostic test feature to help identify electronic
problems. Prior to any test, perform the Self-Diag-
nostic Test. The self diagnostic system displays
instrument cluster stored fault codes in the odometer
display, sweeps the gauges to the calibration points,
and bulb checks the warning indicators. When the
key is in the ON position with the engine not run-
ning, the MIL will remain illuminated for regulatory
purposes.
To activate the Self-Diagnostic program:
(1) With the ignition switch in the OFF position,
depress the TRIP ODOMETER RESET button.
(2) Continue to hold the TRIP ODOMETER
RESET button untilSofand a number (software ver-
sion number (i.e.Sof 3.2) appears in the odometer
window then release the button. If a fault code is
present, the cluster will display it in the odometer
display. When all fault codes have been displayed,
the cluster will displayªendºin the odometer dis-
play. Refer to the INSTRUMENT CLUSTER DTC'S
table to determine what each trouble code means.
INSTRUMENT CLUSTER DTC'S
DTC DESCRIPTION
100.0 LOOP-BACK FAILURE
100.1 ABS COMMUNICATION FAULT
100.2 BCM COMMUNICATION FAULT
100.3 EATX COMMUNICATION FAULT
100.4 FCM COMMUNICATION FAULT
100.5 ORC COMMUNICATION FAULT
100.6SBEC/DEC/MCM COMMUNICATION
FAULT
200.0 AIRBAG LED SHORT
200.1 AIRBAG LED OPEN
200.2 ABS LED SHORT
200.3 ABS LED OPEN
200.6 EL INVERTER TIME-OUT
200.7 EATX MISMATCH
CALIBRATION TEST
The CLUSTER CALIBRATION table contains the
proper calibration points for each gauge. If the gauge
pointers are not calibrated, a problem exists in the
cluster. If any gauge is out of calibration, replace the
cluster.
CLUSTER CALIBRATION
SPEEDOMETER CALIBRATION POINT
1 0 MPH (0 KM/H)
2 20 MPH (40 KM/H)
3 60 MPH (100 KM/H)
4 100 MPH (160 KM/H)
TACHOMETER
1 0 RPM
2 1000 RPM
3 3000 RPM
4 6000 RPM
FUEL GAUGE
1 EMPTY
2 1/4 FILLED
3 1/2 FILLED
4 FULL
TEMPERATURE
GAUGE
1 COLD
2 1/4
3 3/4
4 HOT
ODOMETER SEGMENT TEST
If a segment in the odometer does not illuminate
normally, a problem exists in the display.
ELECTRONIC TRANSMISSION RANGE INDICATOR
SEGMENT TEST
If a segment in the transmission range indicator
does not illuminate normally, a problem exists in the
display.
DIAGNOSIS AND TESTING - CLUSTER
DIAGNOSIS
CONDITIONS
Refer to the following tables for possible problems,
causes, and corrections.
²INSTRUMENT CLUSTER DIAGNOSIS
²SPEEDOMETER DIAGNOSIS
²TACHOMETER DIAGNOSIS
²FUEL GAUGE DIAGNOSIS
²TEMPERATURE GAUGE DIAGNOSIS
²ODOMETER DIAGNOSIS
²ELECTRONIC GEAR INDICATOR DISPLAY
DIAGNOSIS
²MECHANICAL TRANSMISSION RANGE
INDICATOR (PRND21) DIAGNOSIS
8J - 2 INSTRUMENT CLUSTERRS
INSTRUMENT CLUSTER (Continued)
ProCarManuals.com
SPEEDOMETER DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
NO POINTER
MOVEMENT.1. INTERNAL CLUSTER
FAILURE.1.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF SPEEDOMETER POINTER MOVES TO
CALIBRATION POINTS DURING TEST LOOK FOR
ANOTHER POSSIBLE CAUSE OF FAILURE.
²IF THE POINTER DOESN'T MOVE DURING TEST,
CHECK FOR POWER AND GROUND TO THE MIC. IF
POWER AND GROUND ARE PRESENT GO TO STEP
1.B.
1.B. REPLACE CLUSTER. GO TO STEP 1.C.
1.C. CONNECT CLUSTER INTO INSTRUMENT
PANEL WIRING HARNESS. PLACE IT BACK INTO
THE PROPER POSITION IN THE INSTRUMENT
PANEL. PUT IN THE TOP FOUR MOUNTING
SCREWS AND SECURE THE CLUSTER TO THE
INSTRUMENT PANEL.
2. NO SPEED PCI BUS
MESSAGE OR ZERO
MPH PCI SPEED BUS
MESSAGE.2.A. CHECK THE PCM (CODE 10) USING A DRB IIIT
SCAN TOOL. IF OK, GO TO STEP 2.B. IF NOT OK,
REFER TO THE PROPER POWERTRAIN
DIAGNOSTIC PROCEDURES MANUAL TO REPAIR
THE PCM.
2.B. CHECK THE SPEED SIGNAL INPUT INTO THE
PCM. THE SPEED SIGNAL ORIGINATES FROM ONE
OF THE FOLLOWING SOURCES:
²A DISTANCE SENSOR FOR VEHICLES WITH 3
SPEED AUTOMATIC TRANSMISSION. CHECK
CONTINUITY FROM DISTANCE SENSOR TO PCM. IF
OK, REPLACE DISTANCE SENSOR. IF NOT OK,
REPAIR WIRING.
²THE TCM FOR VEHICLES WITH THE 4 SPEED
ELECTRONIC TRANSMISSIONS. CHECK
CONTINUITY FROM TCM TO PCM. IF OK, USE A
DRB IIITSCAN TOOL TO CHECK TCM. REFER TO
THE PROPER TRANSMISSION DIAGNOSTIC
PROCEDURES MANUAL TO REPAIR THE TCM. IF
NOT OK, REPAIR WIRING.
8J - 4 INSTRUMENT CLUSTERRS
INSTRUMENT CLUSTER (Continued)
ProCarManuals.com
CONDITION POSSIBLE CAUSES CORRECTION
ERRATIC POINTER
MOVEMENT.1. ERRATIC MESSAGE
FROM ANOTHER
MODULE.1.A. CHECK THE BCM USING A DRB IIITSCAN TOOL
IF OK, GO TO STEP 1.B. IF NOT OK, REFER TO THE
PROPER BODY DIAGNOSTIC PROCEDURES
MANUAL TO REPAIR THE BCM.
1.B. CHECK THE PCM USING A DRB IIITSCAN
TOOL. IF OK, GO TO STEP 1.C. IF NOT OK, REFER
TO THE PROPER POWERTRAIN DIAGNOSTIC
PROCEDURES MANUAL TO REPAIR THE PCM.
1.C. CHECK THE SPEED SIGNAL INPUT INTO THE
PCM. THE SPEED SIGNAL ORIGINATES FROM ONE
OF THE FOLLOWING SOURCES:
²A DISTANCE SENSOR FOR VEHICLES WITH 3
SPEED AUTOMATIC TRANSMISSION. CHECK
CONTINUITY FROM DISTANCE SENSOR TO PCM. IF
OK, REPLACE DISTANCE SENSOR. IF NOT OK,
REPAIR WIRING.
²THE TCM FOR VEHICLES WITH THE 4 SPEED
ELECTRONIC TRANSMISSIONS. CHECK
CONTINUITY FROM TCM TO PCM. IF OK, USE A
DRB IIITSCAN TOOL TO CHECK TCM. REFER TO
THE PROPER TRANSMISSION DIAGNOSTIC
PROCEDURES MANUAL TO REPAIR THE TCM. IF
NOT OK, REPAIR WIRING.
2. INTERNAL CLUSTER
FAILURE.2.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF THE POINTER MOVES DURING TEST BUT
STILL APPEARS ERRATIC, THEN GO TO STEP 2.B.
2.B. REPLACE CLUSTER ASSEMBLY.
RSINSTRUMENT CLUSTER8J-5
INSTRUMENT CLUSTER (Continued)
ProCarManuals.com
CONDITION POSSIBLE CAUSES CORRECTION
SPEEDOMETER
INACCURATE.1. SPEEDOMETER OUT
OF CALIBRATION.1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST.
²IF SPEEDOMETER IS ACCURATE TO THE
CALIBRATION POINTS THEN LOOK FOR ANOTHER
POSSIBLE CAUSE OF INACCURACY.
²IF SPEEDOMETER IS NOT ACCURATE TO THE
CALIBRATION POINTS, REPLACE CLUSTER
ASSEMBLY.
2. WRONG
SPEEDOMETER PINION
FOR TIRE SIZE.2.A. IF VEHICLE HAS A 4 SPEED ELECTRONIC
TRANSMISSION GO TO STEP 2.C. OTHERWISE GO
TO STEP 2.B.
2.B. CHECK IF CORRECT SPEEDOMETER PINION IS
BEING USED WITH TIRES ON VEHICLE. REFER TO
TRANSMISSION FOR DIAGNOSIS AND TESTING.
²IF THE INCORRECT PINION IS IN TRANSMISSION
THEN REPLACE WITH CORRECT PINION.
²IF THE CORRECT PINION IS IN THE
TRANSMISSION, CHECK TIRE SIZE.
2.C. USE A DRB IIITSCAN TOOL TO CHECK THE
TCM TO SEE IF THE CORRECT TIRE SIZE HAS
BEEN PROGRAMMED INTO THE TCM.
²IF THE INCORRECT TIRE SIZE WAS SELECTED,
SELECT THE PROPER TIRE SIZE.
²IF THE CORRECT TIRE SIZE WAS SELECTED,
CHECK SPEED SENSOR.
3. BAD SPEED SENSOR. 3. REFER TO TRANSMISSION, SPEED SENSOR,
DIAGNOSIS AND TESTING.
TACHOMETER DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
NO POINTER
MOVEMENT.1. INTERNAL
CLUSTER FAILURE.1.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST AND
CHECK FOR FAULT CODES.
²IF TACHOMETER POINTER MOVES TO CALIBRATION
POINTS DURING TEST, LOOK FOR ANOTHER POSSIBLE
CAUSE OF FAILURE.
²IF THE POINTER DOESN'T MOVE DURING TEST,
CHECK FOR POWER AND GROUND TO THE MIC. IF
POWER AND GROUND ARE PRESENT GO TO STEP 1.B.
1.B. REPLACE CLUSTER. GO TO STEP 1.C.
2.9NO RPM9PCI BUS
MESSAGE OR9ZERO
RPM9PCI BUS
MESSAGE FROM
PCM.2. CHECK THE PCM USING A DRB IIITSCAN TOOL.
REFER TO THE PROPER POWERTRAIN DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE AND
REPAIR.
8J - 6 INSTRUMENT CLUSTERRS
INSTRUMENT CLUSTER (Continued)
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